RADIAL GAP TYPE ROTATING ELECTRICAL MACHINE, BLOWER, COMPRESSOR, AND AIR CONDITIONER

摘要

A radial gap type rotating electrical machine includes a field and an armature. The field includes a permanent magnet and a magnetic ring which serves as a back yoke of the permanent magnet. The magnetic ring is provided at a position farther from the armature than the permanent magnet, and includes a recess at a magnetic pole center. The magnetic pole center is a center of a magnetic pole in a circumferential direction with respect to a rotation axis. A thickness of the recess in the radial direction around the rotation axis as a center comes to locally thin.

主权项

1. A radial gap type rotating electrical machine comprising:
a field which has permanent magnets forming a predetermined number of magnetic poles and which rotates on a rotation axis as a center; and an armature facing the permanent magnets through a cylindrical gap in a direction perpendicular to the rotation axis and having a number of teeth more than the predetermined number and an armature coil concentrated-wound around a winding portion of the teeth, wherein the field further includes a magnetic ring which is provided at a position farther from the armature than the permanent magnet and which serves as a back yoke of the permanent magnet, the magnetic ring includes a recess, a thickness of which in a radial direction around the rotation axis as a center comes to locally thin at a magnetic pole center which is a center in a circumferential direction with respect to the rotation axis of the magnetic poles.